create table news(
	newsid		number(8) constraint newsid_pk primary key,
	title			varchar2(50) not null,
	author		varchar2(10) not null,
	source		varchar2(20) not null,
	content		varchar2(100) not null,
	time			date default sysdate not null
);
create sequence news_seq increment by 1 start with 1;
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈', '小叶', '光明', '哈哈哈哈哈哈哈哈哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈', '小叶', '光明', '哈哈哈哈哈哈哈哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈哈', '小叶', '光明', '哈哈哈哈哈哈哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈哈哈', '小叶', '光明', '哈哈哈哈哈哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈哈哈哈', '小叶', '光明', '哈哈哈哈哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈哈哈哈哈', '小叶', '光明', '哈哈哈哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈哈哈哈哈哈', '小叶', '光明', '哈哈哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈哈哈哈哈哈哈', '小叶', '光明', '哈哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈哈哈哈哈哈哈哈', '小叶', '光明', '哈哈');
insert into news(newsid, title, author, source, content) values(news_seq.nextval, '哈哈哈哈哈哈哈哈哈哈', '小叶', '光明', '哈');
